Air and like pump.



PATENfIED JULY 21, 1908.

n; B. MORISON. AIR AND LI-KB PUMP. APPLICATION FILED MAY 18, 1907.

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No. 894,031. PATENTED JULY 21, 1908.

D. B. MORI'SON. AIR AND LIK'E PUMP.

APPLICATION FILED MAY 18. 1907.

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P-ATENTED ULY 21, 1908. -n. B. Memo-m AIR AND LIKE PUMP.

APPLICATION FILED MAY 18, 1.907.

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' 1). B. mossm. Am AND LIKE PUMP.

APPLICATION FILED KAY 18, 1907.

PATENTED JULY 21, 19015.

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k i w 6 N0. ESQ-$13 1. PATEN-TED JULY 21, 1908 D. B."MORISON. AIKAND LIKE PUMP.

' APPLICATION TILED MAY18,1907.

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DONALD BARNSMORISON, OF HARTLEPOOL, ENGLAND.

AIR AND Lnce PUMP.-

To all whom it may concern: .Be it known that I, DONALD BARNsMoRI- :SON, a sub ect of the KinIgI of Great Britain and Ireland, residing at artlepool, in.the county. of Durham, England, have invented Improvements in Air and Like Pumps, of

Iinder ta which the following is a specification.

This invention relates to air and like pumps of the valveless bucket type in which discharge of the contentsof the working cylor of one strokeand in which at the end of the downstrokeor reverse stroke-the contents or part thereof, of the lower or corresponding end of the pump are forced through an annular passage and through-one or more ports in the cylinder Walls into the space above or at one side of the bucket, and it has for its object to improve'such pumps so as to obtain a higher dut from them by in creasing the amount of uid discharged for each double stroke.

The invent on. consists in the construction,

' and method of workin of a pump of the kind referred to, accor mg to which on the downstrokewlien the pump is of the vertieal typeor on one stroke, say the in- 'strokewhen the pump is of the horizontal typeair or other gas, or air and water, or

any mixture of fluids which are, in the main, elastic, are drawn through a port controlled by a valve into the cylinder above or at one side of the valveless bucket, While air or water or other fluid or fluids which have previouslyentered the lower or opposite end of the pump cylinder are, towards the end of the down stroke or instroke, subjected to pressure by the descending or-inwardly moving bucket and forced by it out of the base or inner end of the pump into a space or passage or passages outside of or formed in the cylinder Wall and thence into'the space above or at the outer side of the bucket, thereby adding to the weight of fluid discharged on the next upstroke or outstroke of the bucket and materially increasing the duty of the pump. Pumps designed to work in the manner described can be constructed in various forms in the accompanying illustrative drawings, Figure 1 shows in central vertical sectirnnoxc construction of vertical air pump embodying the present invention and speciallyintended to use as the air pump of Specification of Letters Patent.

Application filed May 18,

ms place at the end of the upstrokev Patented July 21, 1903.

1907. Serial No. 374,389. i

condensing a paratus' Fig. 2 is a sectional 1 detail view siiowing a modification. Fig. '3 is a similar viewto Fig. 1, and Fig. 4a sectional plan on the line A A of Fig. 3., showing a modified construction of'vertical air pump. Figs. 5 to 8 inclusive, show in vertical secpumpsof the vertical type. i

In Fig. 1, (z is the ump barrel or cylinder,

cated therein from above by the rod c is a suction chamber below the cylinder a. Surrounding the lower ortion of the pum cylinder a is an annu ar passage e whic communicates with the lower end of the pump cylinder at e and also through the ports f with the interior of the cylinder at a hi her level. The ump is provided with hea or discharge va ve's g and in the base of the pump are foot valves h of whichone is shown: These foot valves may be arranged all round the base of the pump and serve to admit air and water from the suction chamber 0 to the interior of the cylinder a on'the upstroke of the bucket b. Suitably dis ose'd in the cylinder wall are ports is throng which air can flow intothe cylinder above the bucket during the downstroke of the latter. The. air enters the pump casing through the inlet m along with water which flows into the suction chamber '0, and on-its way to the ports 76 it flows through-a passage 0 and past an air valve n which rises automatically when the pressure that in the passage 0 and falls automatically portion of the cylinder above the bucket-b. Although a single air valve is referredcto, any desired number of such valves may be used.

. The action of the pump is as follows z- On the downstroke of the bucket b a dimia above the bucket until the latter passes the air inletports is through which air is then drawn into the cylinder until the ports f are uncovered. Meanwhile the air and water drawn through the foot valves it into the lower end of the pump cylinder av during the previous upstroke are being subjected to pressure and the air thereby reduced in volume, and, as soon as the bucket unand b the'valveless ucket which is reci r05 in the pump cylinder at becomes less thanonto its seat on any rise of pressure in the" tion, other modified constructions of air nution of pressure takes place in the cylinder covers the ports f,-the.ai r and water are,

in great part, forced through the" annular passage 6 and through the ports f into the cylinder (1 above the bucket b, the air valve 7, or each air valve, at once closing automatically. During the upstroke of the bucket, the air valve or valves remain closed, and the air above the bucket is compressed and discharged through the head valves 9 at the end of the stroke, together with the water, with the exception of an amount thereof equal to the clearance space that is left between the top of the cylinder a and the top of the bucket 71 at the end of the upstroke of the latter and Which, as a rule, will be fully occupied with water. During the upstroke, moreair and water are drawn into the lower end of the pum cylinder a through the foot valves h whic close at the end of the upstroke. The cycle is then re eated.

he air valve n, or each air valve, can be of any suitable form, and is arranged in a chamber provided with a removable door 1* for facilitating its examination and removal.

In the example now being described, the

air valve is shown as a light spring metal flap valve. The said valve may be water sealed, either by water drawn in by the foot bucket valves 71, or by water independently supplied, as for example by the pipe y.

Instead of forcing fluid from the base of the pump cylinder a to the space above the bucket b by way of an annular passage such.

as e, grooves or open channels of suitable length and suitably spaced, may, as shown in Fi 2, be formed in the inner surface of the cy inder wall for the purpose mentioned.

In the construction of pump shown in Fig. 1, the ports 76 are at such a height in the pump 0 linder that they are covered by the at the end of the upstroke thereof.

' The said ports may however, if desired, and

in some cases can, with advantage, be placed at a lower level so that, after being covered by the bucket on its upstroke, they will be again uncovered by such bucket just as the same reaches the top of its stroke, when they will therefore be in free communication with the lower portion of the ump cylinder which is then filled with alr-or air and Water-at a pressure equal to or less than the pressure in the air pump suction pipe and passage 0, so that the fluid which the orts contain will not seriously affect the v0 ume of air drawn through the valve 02-, during the next downstroke of the bucket. Such an arrangement is illustrated in Fig. 3 wherein the bucket b is shown at the top of its upstroke and the ports is in free communication with the pump cylinder a below the bucket. The foot valves h in this arrangement are shown dis osed at the side of the pump cylinder, an the air valves 12., of which several are shown in Fig. 4, are of the disk type.

Fig. 5 shows an air pump in which the bucket 12 is driven from below and in which there are no foot valves and only one admission port or set of ports 7r. This type of pump is s ecially suitable for condensing plants in w ich the water of condensation is drawn from the condenser by an independent pump and in which the pump, as illustrated, draws only vapor and air, the sealing and cooling water, when such is required, being admitted to the pump cylinder a, as through a pipe 3 above the valve or valves n, or otherwise, as may be desired. The single set of admission ports 7c is controlled by the valve or valves n which serves or serve .to admit fluid to the cylinder above the bucket to during a considerable portion of the downstroke and to admit fluid to the cylinder below the bucket at the end of the upstroke.

shown in Fig. 1, the fluid being put under pressure in the lower end of the pump cylinder and forced into the space above the bucket at the end-of the downstroke after the portion of the cylinder above the bucket has already been filled with vapor and air by suction.

Fig. 6 shows an air pump in which water, with or without air, is admitted to the annular passage e through a foot valve or'valves h arranged outside the cylinder (1 and between the said chamber or passage and the inlet m, the pump being provided with one or more air inlet ports is may be controlled by an air valve n as in theother arrangements hereinbefore described.

In order that the pressure in the lower end of the pump cylinder a may not at any time exceed a safe limit, one or more relief va'lves such as shown in Figs. 7 and 8 may be fitted. In Fig. 7, a spring loaded relief valve 9 is arranged to discharge by a passage to into the suction chamber 0. In Fig. 8, the discharge takes-place through a passage a into the upper part of the pump cylinder a, or by a pipe as into the delivery chamber 12; or the d1scharge may be otherwise disposed of as deg sired. Thus, the relief valve g, may, as indicated in Fig. 3, be placed in the bucket b and be suitably loaded, as by a spring, to lift only with abnormal pressure.

Although the drawings only show pumps of thevertical ty e, the pumps may be otherwise disposed; t e valves may also be of any suitable design and be arranged as may be most convenient in each case.

-A pump constructed according to the present invention may be used either as a single stage air pump, or as the first or second stage pump of a two stage arrangement. Also, t may beemployed for dealing with any elastic fluid, 0; mixture of fluids mainly elastic.

When the fluid. required to be pumped is wholly elastic, as for exarrlplethe case of a dry air pump for a steam condensing plant.

air pumps for condensin plants, t, e water vapor may constitute a arge pro ortion of the fluid which enters the pump. lso, in the claims, it is to be understood that the terms downstroke and upstroke are to be understood as not limiting the claims to pumps of the vertical type but are intended to respectively include the terms instroke and out stroke, as in the case of pumps of the horizontal ty e.

What claim iss- 1. An air or like pump comprising a cylinder, .a bucket arranged toireciprocate therein, means for admitting fluid to the upper por tion of said cylinder during the downstroke of the bucket and while its lower portion is closed by said bucket, a valve controlled inlet independent of said bucket for, admitting fluid to the lower end of said cylinder, a valveless passage for placing the upper and lower portions of sait cylinder at opposite sides of said bucket in communication with each other when said bucket arrives near the end of its downstroke and whereby fluid will then be forced by said bucket from the lower side to the upper side thereof,'and a delivery outlet and valve whereby the combined fluids can be discharged from the upper portion of said cylinder on the next upstroke of the bucket.

2. An air or like pump comprising a cylinder and a reciprocator bucket therein, said cylinder having an in ct for admitting fluid to its u'aper end portion during the down stroke oi the bucket and while its lower portion is closed by said bucket, an automatic non-return valve for controlling the flow of fluid through said inlet into sald cylinder, a valveless passage formed in the wall of said cylinder. whereby the two portions of the cylinder above and below the bucket will be placed only in communication with each other when the bucket arrives near to the end of its downstroke, and a fluid delivery outlet and valve at its upper end.

3.v An air or like pump comprising a cylin der and a reciprocatory bucket therein, said cylinder having separate inlets for admission of fluidto the upper and lower end portions of said cylinder, automatic non-return valvesfor both fluid inlets, a valveless connecting passage formed in the cylinder wall whereby the two portions of the cylinder at op osite sides of said bucket will, when the buc 'et arrives near to the end of its downstroke, be placed in communication wit-h each other through ports that are located between the separate fluid inlets, and a delivery outlet with valve whereby fluid can be discharged from said cylinder at each upstroke of the bucket.

4. An air or like pump comprising a cylinder and ,a bucket arranged to reciprocate therein, said cylinder having a fluid inlet with a non-return valve arranged to admit fluid to the lower portion of said cylinder dur ing the upstroke of said bucket, a fluid inlet with valve arranged to admit fluid to the upper ortion of"said cylin der during the downstro e of said bucket, a fluid delivery outlet with controlling valve at the upper end of said cylinder, and a valveless passage communicating with the interior of said cylinder through an annular row of ports arranged between the lower and u per fluid inlets and through which fluid will be forced from the lower portion, of the-cylinder to the upper portion thereof when the bucket arrives near the end of its downstroke.

5. An air or like pump comprising a cylinder and a bucket arranged to reciprocate therein, said cylinder having a fluid inlet with controlling valve arranged to adnrit fluid to the lower portion of said cylinder during the upstroke of said bucket, a'fluid inlet with controlling valve arranged to admit fluid to the upper ortion of said cylinder during the downstro e of said bucket, a

fluid delivery outlet with controlling valve 1 at the upper end of said cylinder, and a valveless passage formed in the cylinder wall and communicating with the interior of-said cylinder through an annular row of ports arranged between the lower and up er fluidinlets and through which fluid wi be forced from the lower ortion of the cylinder to the upper portion t ereof when the bucket arrivesnear the end of its downstroke.

6. An air or like pump comprising a cylinder and a bucket arranged to reciprocate therein, said cylinder having a fluid inlet with controlling valve arranged to admit fluid to the lower portion of said 0 linder during the upstroke of said bucket, a uid inlet with controlling valve arranged to admit; fluid to the upper portion of said cylinder during the downstroke of said bucket,'a fluid delivery out-let with controlling valve at the upper end of said cylinder, and a valveless passage communicating with the interior of said cylinder through. an annular row of orts arranged between the lower and u per fluid inlets and through which fluid wi be forced from the lower port-ion of the cylinder to the upper portion thereof when the bucket arrives near the end of its downstroke, the fluid inlets to the upper and lower ends of said cylinder being in communication with an inlet branch common to them,

7. An air or like pump comprising a cylinder and a'bucket arranged to reciprocate therein, said cylinder having a fluid inlet with controlling valve arranged to deliver 25 the upper portion of said cylinder during the fluid to the lower portion of said cylinder during the upstroke of said bucket, a fluid inlet with controlling valve arranged to deliver fluldto the upper portion of said cylinder during the downstroke of said bucket,

' portion of said cylinder when the bucket is at the-end of its u stroke, a fluid delivery out let w th control ing valve at the upper end of said cylinder, and a passage communicating with the interior of said cylinder through an annular row of ports arranged between the lower and .11 per fluid. inlets and through which fluid Wlll be forced from the lower portion of the cylinder to the upper portion thereof when thebucket arrives near the end of its downstroke.

8.- An air or like pump comprising a cylinder and a bucket arranged to reci rocate therein, said cylinder having a fluid i et controlled hy e valve arranged to admit fluid to the lower portion of said cylinder during the upstroke ofsaid bucket, a fluid inlet with controllingiralve arranged to admit fluid to downstroke of said bucket, a fluid delivery outlet with controlling valve at the upper end of said cylinder, and a valveless connecting passage communicating with theinterior of said cylinder through an annular row of orts arranged between the lower and upper iluid inlets and through which fluid can be forced from the lower portion of the cylinder to the upper portion thereof when the bucket arrives near the end of its downstroke, the fluid inlet to the lower end portion of the cylinder being arranged to dehver into said connecting passage.

'-9. An air or like pump comprising a cylinder'and a bucket arranged to reciprocate therein, said cylinder having a fluid inlet with controlling valve arranged to admit fluid to the lower portion of said cylinder during the upstroke of said bucket, a fluid inlet with controlling valve arranged to admit fluid to the upper portion of said cylinder during the downstroke of said bucket, a fluid delivery outlet with controlling valve at the upper end of said cylinder, and a valveless passage formed in the cylinder Wall and communicating with the interior of said cylinder through an annular row of ports arranged between the lower and up er fluid inlets and through which fluid will e forced from. the

' lower portion of the cylinder to the upper sage so that fluid issuing from it will portion thereof when the bucket arrives near to the lower end of its downstroke,'the fluid. inlet to the lower end portion of the cylinder being directed towards said connectin pas-- ow into said connecting passage. I

10. An air or like pump comprising a cylinder and bucket arranged to reciprocate therein, sa d cylinder having a fluid inlet.

with controlling valve arranged to admit fluid to the lower portion of said cylinder during the upstroke of said bucket, a fluid inlet with controlling valve arranged to deliver fluid to the upper ortion of said cylinder during the downstro e of said bucket, a fluid delivery outlet with controlling valve at the upper end of said cylinder, a passage communicating with the interior of said cylinder through an annular row of ports arranged between the lower and upper fluid inlets and through which fluid wi be forced from the lower portion of the cylinder to the upper portion thereof when the bucket arrives near the end of its downstroke, and a safety discharge passage with loaded valve arranged to be opened only in the event of fluid in the lower part of said cylinder being subjected to undue pressure. 11. An air or like pump comprising a vertically arranged cylinder having a conical lower end with a fluid inlet in communic'ation therewith, a fluid inlet arranged at an intermediate portion of its height and having an inwardly opening automatic valve for admitting fluid to the upper end portion of said cylinder during the downstroke of the pump, 'a valve controlled fluid discharge outlet at its upper end, an annular set of ports arranged between the lower end of said cylinder and the upper inlet for fluid and communicating ranged at an intermediate portion of its I height, an automatic inwardly'opening valve for admitting fluid tothe upper portion of said cylinder during the downstroke of the pump, a valve controlled fluid discharge outlet at its upper end, and an annular set of ports arranged between its lower endand the upper inlet for fluid and communicating by a va veless passage with its lower end, anda bucket having a conical lower end arranged to reciprocate in said cylinder and to open and close said ports.

13. An air or like-pump comprising a vertically arranged cylinder having a valve. controlled inlet for fluid at its lower'end, a fluid inlet arranged at an intermediate portion of its height and provided with an automatic inwardly opening valve, a valve controlled fluid discharge outlet at its upper end, and an annular set of ports arranged between the lower end of said cylinder and the upper inlet for fluid and communicating by a valveless passage with the lower end of said cylinder, and a bucket arranged to reciprocate in said cylinder and to open and close said ports, said fluid inlets being connected to an nlet branch common to them.

each controlled by an automatic inwardly opening valve, and a valveless passage adapted to establish communication betweenthe upper .andthelower portions of said cylinder the communication with the said upper portlon being by way of a set .ofports controlled by said bucketend located intermediate bet-ween the said u per and lower inlets for fluid, and a loaded passage arranged-in said bucket torevent undue fluid pressure in the lower enc of said cylinder on the downstroke of said bucket.

Signed at'Ha'rtlepool, in the county of Durham, England, this sixth day of May, 1907.

DONALD BAR YS MORISOX. Witnesses:

JVD. ApAMsoN, A.BOWEN.

relief Valve and 

